Vitamin B2, riboflavin, is soluble in water. If 0.833 g of riboflavin is dissolved in 18.1 g H2O, the resulting solution has a freezing point of -0.227oC. Kf = 1.86oC/m (a) What is the molar mass of riboflavin? (b) What is the molecular formula of riboflavin if combustion analysis shows it to consist of 54.25% C, 5.36% H, 25.5% O and 14.89%N

Q: The freezing point of ethanol, CH3CH,OH, is -117.300 °C at 1 atmosphere. KAethanol) = 1.99 °C/m In a…

A: Given: Mass of compound (solute) = 12.60 g Mass of ethanol (solvent) = 265.8 g Freezing point of…

Q: molality of the 0.75 mol of salt (NaCl) dissolved in 155 g of water?

A: Given,  Moles = 0.75 mol Mass of solvent = 155 g = 0.155 Kg Molality = mole/mass of solvent(Kg)

Q: What is the freezing point of a solution that is made by dissolving 284 grams of iron(III) sulfate,…

A: Amount of Fe2(SO4)3 = 284 gMolecular wt. of Fe2(SO4)3 =399.88 g/moleNo of moles of Fe2(SO4)3 =…

Q: What mass of AgNO3 has been dissolved in 200g of H2O if the solution is 0.300 molality?

A: Molality is represented by ‘m’ and is defined as the number of moles of solute present in 1 kg of…

Q: Magnesium citrate, Mg3(C6H5O7)2, belongs to a class of laxativescalled hyperosmotics, which cause…

A: Magnesium citrate belongs to a class of laxatives called hyperosmotics, which cause rapid emptying…

Q: What is the solubility in g/L of O2 at a partial pressure of 311.9 torr, if the solubility at a…

A:

Q: A solution of H2SO4(aq) with a molal concentration of 1.94 ? has a density of 1.119 g/mL. What is…

A:

Q: 14. What is the molecular mass of a substance if 22.5 g dissolved in 250 g of water produces a…

A: We are required to find the molar mass of the substance  Mass of substance taken=22.5 gm

Q: The freezing point of ethanol, CH3CH,OH, is -117.300 °C at 1 atmosphere. Kgethanol) = 1.99 °C/m In a…

A: Given: The freezing point of pure ethanol is -117.300°C. The freezing point depression constant of…

Q: Sorbitol is a sweet substance found in fruits and berries and sometimes used as a sugar substitute.…

A:

Q: What is the molality of a 5.86 M ethanol (C2H5OH) solution whose density is 0.927 g/mL?

A: The given molarity of ethanol = 5.86 M                  Density of ethanol = 0.927 g/mL The molar…

Q: Find molal concentration of a sugar solution in water that has a freezing point of -2.1C. Kf=1.86C/m…

A: The molality of the species can be expressed as the ratio of the moles of the species to the solvent…

Q: The freezing point of a 0.21m aqueous solution of H2SO4 is -0.796oC. i = 2.04 b. Is the solution…

A: Given, Molality (m) = 0.21 m □Tf = 0.796 °c Kf = 1.86 °c/m □Tf = i×Kf ×m i = 0.796/0.21×1.86 =2.01

Q: A small cube of lithium (density = 0.535 g/cm3) measuring1.0 mm on each edge is added to 0.500 L of…

A:

Q: Ethylene glycol (C₂H₆O₂) is used as an additive to the water in your automobile to lower its…

A: Lowering in freezing point of a solution is:

Q: What is the freezing point of an aqueous PCl₃ solution made to be 0.81 m PCl₃? (Kf for water is 1.86…

A: Given : Solution is an aqueous solution of PCl3 means solvent is water and solute is PCl3. And…

Q: Mass of test tube, beaker, and cyclohexane = 100.17 g Mass of test tube and beaker =  84.07 g…

A: The mass of the test tube, beaker, and cyclohexane = 100.17 g The mass of the test tube and beaker =…

Q: Calculate the molarity of 0.4g of NaOH dissolved in 100cm3 of water

A: The given data: The mass of NaOH = 0.4 g. The volume of water = 100 cm3 = 100 mL. To determine = The…

Q: What is the Solubility of Oxygen O2 , in water ( in units of mL/1000g H2O)?

A: Solubility is 27.99 mL/1000g H2O

Q: What is the freezing point of a solution of water if, 25.0 grams of acetone (C3H6O) is mixed with…

A: Please find your solution below : Colligative properties are the properties of solutions that depend…

Q: 6. The normal freezing point of ethanol is -117.30 °C. How many grams of electrolyte K2SO4 (molar…

A: Given Mass of ethanol = 35 g Kf = 1.99 °C/m T1 = -117.3°C T2 = -120.25 °C Molar masa of K2SO4 = 58.1…

Q: When 0.494 g of K3Fe(CN)6 is dissolved in 100.0 g of water,the freezing point is found to be…

A: The number of ions  present in K3Fe(CN)6 has to be given,

Q: What is the molality of a 12.0M HCI solution with a density of 1.18g/mL? What is the mass percent?

A: Hello. Since multiple questions have been posted, the first question shall be solved only. In case…

Q: What is the Solubility of Oxygen O2, in water ( in units of mL/100g H2O)?

A: Solubility is 2.8 mL/100 g H2O

Q: What is the molar solubility of CaCO3 at 50°C in a solution pre- pared by dissolving 1.000 L of CO2…

A: According to Charle's law: V1/T1 = V2/T2 Given, Initial temperature T1 = 20 oC = 20+273 = 293 K…

Q: The freezing point of water, H,0, is 0.000 °C at 1 atmosphere. KAwater) = 1.86 °C/m In a laboratory…

A:

Q: The solubility of nitrogen gas at 25˚C and 1 atm is 6.8 x 10-4 mol/L.  If the partial pressure of…

A: Applying Henry’s equation,S = k*P Here,  P = 1 atm S = 6.8 X 10-4 mol L-1  The partial pressure of…

Q: An aqueous solution of ammonium sulfate is made. If the Kf is 1.86 and the freezing point is -8.75°C…

A: Colligative properties: The colligative properties are those properties of solutions that depend on…

Q: How many grams of the nonelectrolyte glycerol, C3H8O3 , would have to be added to water in order to…

A: Let x gram of glycerol is added to form 1 L of solution. We know that: Molar mass of glycerol = 92…

Q: What mass of potassium chloride (KCl) is soluble at 40oC?

A: The given solubility graph of salts is :

Q: Crude oil pumped out of the ground may be accompanied by formation water, a solution that contains…

A: Colligative properties are the properties which depend on the number of atoms or molecules or ions…

Q: Gypsum ( CaSO4 x 2H2O) is a mineral used for making wallboard for construction. The mineral is…

A: Gypsum ( CaSO4 x 2H2O) is a mineral used for making wallboard for construction. The mineral is…

Q: The molality of a solution made by dissolving 33.4 g of CH3OH in 50.5 mL of water is ______ m.

A: We have 33.4 g of methanol dissolved in 50.5 mL of water, we have to calculate the molality of…

Q: A solution of H2SO4(aq) with a molal concentration of 6.80 ? has a density of 1.318 g/mL. What is…

A: Given:Density = 1.318 g/mLMolal conc. = 6.80 We need to find the molar concentration of this…

Q: A solution is prepared by dissolving 17.75g sulfuric acid, H2SO4, in enough water to make 100.0mL of…

A: First, using given solution volume and its density value the mass of solution is calculated.

Q: What is the molality of a 0.5000 M solution of sucrose, C12H22O1 in water? the density of the…

A: Molality is moles of solute in 1000 g solvent.  Molarity is  moles of solute in 1000 ml of solution.

Q: . What is the molecular mass of a substance if 22.5 g dissolved in 250 g of water produces a…

A: The formula for freezing point depression when a solute is added to a solution is : ∆Tf=Kf×m∆Tf→ The…

Q: molar mass

A:

Q: when 7.94 g of xylene was added to 132.5 g of cyclohexane, the freezing point of the solution was…

A: In this question we used data of, Freezing point of cyclohexane= 6.50℃ Kf of cyclohexane= 20.0 ℃

Q: Vitamin B2, riboflavin, is soluble in water. If 0.833 g of riboflavin is dissolved in 18.1 g H2O,…

A: Mass of Riboflavin = 0.833 grams Mass of solvent (water) = 18.1 grams Freezing point of Riboflavin…

Q: 3.What is the molality(m) of a solution made from dissolving 179g.of MgCl2 into 1.00L of water?

A: Mass of MgCl2 = 179 g  Volume of water = 1.00 L We need to determine the molality of solution.

Q: 1. What is the molality of a solution of 2.50 g Na,PO, dissolved in 230 g water?

A: Molality is an important method to determine the concentration of a solution. It is generally…

Q: The freezing point of ethanol, CH3CH2OH, is -117.300 °C at 1 atmosphere. Kf(ethanol) = 1.99 °C/m In…

A: Given, In a laboratory experiment, students synthesized a new compound and found that when 13.34…

Q: 3. Calculate the molality of a 6.55 kg sample of a solution of the solute CH;Cla dissolved in the…

A: Since you have posted multiple questions, we will solve the 1st one for you. Kindly post the other…

Q: The freezing point of a 0.10 m solution of mercury(I) nitrate is approximately -0.27 celsius…

A:

Q: A sports drink formulation can be prepared by mixing the ingredients in the quantities shown in the…

A: Since you have asked multiple questions, we will solve first question for you. For remaining…

Q: The freezing point of water, H2O, is 0.000 °C at 1 atmosphere. Kf(water) = 1.86 °C/m In a…

A: Given  Kf    of water    = 1.86 ℃/ m  Mass of Compound ( = 11.94 gram mass of water   = 217.1 gram…

Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.